SUPPLYING CABLE TO WIND FARM EXTENSION A


BB has recently won a contract worth around $30m from wind power development company DONG Energy to supply a high


voltage export cable system that will transmit power from the Burbo Bank Extension Offshore Wind Farm in the UK. ABB’s project scope includes the design, engineering, supply and


commissioning of the 25km long 220kW (kV) AC submarine cable and the related offshore substation cable. ABB will also supply 32km of AC underground cables and the associated substation cables as well as the cable joints, accessories and terminations related to the project. The Burbo Bank Offshore Wind Farm is situated on the Burbo Flats in Liverpool Bay at the mouth of the Mersey river. Burbo Bank receives the


full force of the wind from the Irish Sea in the west making it an ideal location for offshore wind power generation. “Offshore wind is making an increasing contribution to boost the share of renewables in Europe’s energy mix and


this project will support the UK government’s efforts in this area,” said Claudio Facchin, head of ABB’s Power Systems division. “ABB has considerable experience in executing such projects and the technologies to support the efficient integration of renewables into the grid.” www.abb.com


Beware of the dangerous five


There are a whole host of causes of electric motor failure. However, there is a set of usual suspects that tend to crop up more often than the others. Here, European Automation has listed its ‘top five’. Excessive heat is one of the biggest killers for electric motors. In fact, the other four items on this list are often damaging precisely because they contribute to excess heat generation. Dust and contamination particles suspended in the air will find their way into an electric motor. Once inside, the damage they cause depends on the type of particle. If they are abrasive they will wear down components, while some particles are electrically conductive and can interfere with currents across components. Harmonic currents caused by


high frequency switching and pulse width modulation can lead to voltage and current distortion, overloading and overheating. All of these factors reduce the life of the motor and its components and increase long term equipment costs - but that’s only one issue. Power surges cause their own problems as do over and under voltage. Managing these issues requires constant attention and care. By themselves moisture and


humidity contribute to the corrosion of components, but when coupled with particles from the air they can create a deadly combination for a motor. Certain particle contaminants can combine with moisture and create even more damaging solutions, shortening the life of motor components even further. The problem with correct


lubrication is that it’s a balancing


STAND D31 www.industrynorth.co.uk


act that can be very difficult to achieve. There are multiple options to get it wrong and only one way to get it right. Over lubrication and under lubrication both pose problems, but there can also be issues with contaminants in the grease, or the use of a lubricant not suited to the task at hand. It is worth remembering that


these problems are all interrelated, tackling only one of them won’t necessarily solve the problem. All of them have one thing in common - they can be avoided with correct motor usage and maintenance as well as environmental management. www.euautomation.com


PROTECTING POWER SUPPLY TO SUBSEA ROVS


Sixty-three millimetre LTP conduit and special engineered fittings from Fleixcon are being used to protect subsea Remotely Operated Vehicles (ROVs) used by Total Marine Technology. The fittings are protecting the slip-ring connections inside the winch which provides 3.3kV feeds to the 3km power transmission system, which connects the subsea ROV to the surface. In addition to the power cables’ fibre optic, elements are included in the single cable connection system called an umbilical. The tail from the slip ring is a loose bundle of copper and fibre optic cables which terminates in a junction box on the winch. This bundle needs protecting from sea spray and harsh offshore environments to maximise its service life and provide trouble-free operation.


Total Marine Technology is using the custom winches on SapuraKencana pipe lay ships, which will work on a


number of oil and gas projects in Brazil, China and Australia. Slobodan Stankovic, electrical project manager for Total Marine Technology, commented, “It is absolutely essential


that we don’t lose power and data to the ROV, because when the ROV is not working the whole rig is down and not drilling. Providing ongoing protection for the slip ring from the environment is therefore vital.” Stankovic went on to explain that the liquid tight LTP conduit was chosen as it can withstand harsh environments


and special connectors were provided to ensure an IP68 rating with different input and output sizes.” www.flexicon.uk.com


Enter 5 / ELECTRICALENGINEERING


GLOBAL MANUFA


F FA


MANUFACTURER & SUPPLIER OF INDUSTRIAL FASTENERS & COMPONENTS


EXHIBITING AT


www.trfastenings.com sales@trfastenings.com


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